Category：Server
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Time：2020-10-27
Author pan Tianying, GitHub ID @ pantianying, an open source enthusiast, works in graffiti intelligence Dubbo is a High-Performance Lightweight RPC framework based on Java. Dubbo provides rich service governance functions and excellent extensibility. Dubbo go provides a unified service capability and standard between Java and golang, which is the main problem that needs to […]
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Time：2020-10-27
describe This bug needs the following conditions: the parent element needs to use absolute positioning absolute or fixed positioning fixed, use overflow: scroll / Auto (or overflow-y: scroll / auto), and the inner child element is of dynamic size (such as large SVG document, approximately embedded iframe, etc.). The reason for the bug: there is […]
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Time：2020-10-27
Source: https://blog.liexing.me/2018/… Recently, I encountered several projects that were coded by utf8 of MySQL. I remember the painful lesson of coding problems before. I will record it and warn myself. Once upon a time, I chose utf8 every time I built a library, and I felt that I didn’t know how cool I was than […]
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Time：2020-10-27
Sqoop is an open source project of Apache. It belongs to the Hadoop family. Its core function is the data conversion and transmission between relational database and Hadoop. From the name, you can probably see: SQL + Hadoop = sqoop. At present, there are two main versions of sqoop, which are sqoop1 and sqoop2. The […]
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Time：2020-10-27
You can install docker and simple operation through dokcer core and installation. 1、 How to create docker image Docker image is not only the core technology of docker, but also the standard format of application publishing. A complete docker image can support the operation of a docker container. In the whole process of using docker, […]
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Time：2020-10-27
Today, we recommend a software uninstall and cleaning tool under Windows system: geek uninstaller Sometimes the computer can’t uninstall the software, Software residual registry affects software installation. There are so many softwares that it is difficult to manage them in a unified way? Geek uninstaller can solve this problem. Software installation free, single file open […]
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Time：2020-10-27
Linux learning This is the first blog. It introduces the configuration environment when I just worked. I don’t have any experience in blogging, so it may be messy. I hope you can include it more. 1、 Common instructions Linux command Encyclopedia -EQ / / equal to -NE / / not equal to -GT / / […]
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Time：2020-10-26
preface So much code, you knowa = 1 + 2How is this code executed by the CPU? Software used so much, do you know the difference between 32-bit and 64 bit software? Can a 32-bit operating system run on a 64 bit computer? Can a 64 bit operating system run on a 32-bit computer? If […]
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Time：2020-10-26
This question is a special classic interview question, involving the front-end personnel should master the basic network knowledge, I believe many front-end students understand. But if you ask deeply, you can also ask a lot of sub questions, and also test the depth of knowledge and flexible use of the interviewer. There are several stages […]
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Time：2020-10-26
1. Preface Recently, I came across the article about PI hole < = 4.3.2 Remote Code Execution Vulnerability (cve-2020-8816). The cause of the vulnerability is not very difficult, but the exp constructed in it has aroused my interest. Since PI hole code converts the parameters of command injection into uppercase, shell parameter extension is used […]
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Time：2020-10-26
Facebook Haystack is a system designed by Facebook to store its small files (pictures). The design idea of the system is to merge small files into a large file for storage, reducing the number of files and IO times when accessing files. Beaver, Doug, et al. “Finding a Needle in Haystack: Facebook’s PhotoStorage.” OSDI. Vol. […]
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Time：2020-10-26
Uiactivityviewcontroller introduction The system sharing function is implemented by uiactivityviewcontroller. This class can share the content to be shared to social media, SMS, e-mail, etc. the shared content can be text, picture, link, video, etc. initialization UIActivityViewController(activityItems: <#T##[Any]#>, applicationActivities: <#T##[UIActivity]?#>) Uiactivityviewcontroller initialization needs to pass two parameters. The first parameter activityitems is the content to […]
